I would encourage anyone interested in autism to take a look at this paper, "Decomposition of phenotypic heterogeneity in autism reveals underlying genetic programs": https://www.nature.com/articles/s41588-025-02224-z

It's, I believe, the peer-reviewed version of this preprint from a couple years ago, "Decomposition of phenotypic heterogeneity in autism reveals distinct and coherent genetic programs": https://www.medrxiv.org/content/10.1101/2024.08.15.24312078v...

Essentially, there are four types of autism! I think they deserve to be known more individually rather than having only one "autistic spectrum". Ever since seeing the preprint I've practiced telling the different types apart, it's been very interesting.